1、(3) 当陈述句的谓语动词是have,表示有什么,改为否定句的方法是: 由havenot其他;由have十no十其他;由dont(doesnt, didnt) +have十其他。(4) 当陈述句的谓语由have十其他词构成,这时have不当“有”讲,也不是“助动词”,改为否定句时,由助动词do(does, did) nothave构成否定结构。(5) 陈述句的谓语动词是行为动词,改为否定句时,要用助动词do(does, did) not十动词原形构成否定形式。(6) 祈使句的否定结构为:Dont 十动词原形。(7) 当陈述句中含有something这个词时,把句子改为否定句有两种方法:其一,在
2、句中相应位置加not,再把something改成anything;其二,直接把something改为nothing即可。(8) 当陈述句是一个主从复合句,而主句的谓语动词是think或believe等时,把这种句子改为否定句,往往是否定think或believe等而不否定后面从句中的谓语动词。例如:I think he can get there tomorrow morning.I dont think he can get there tomorrow morning.2. 把肯定句改为否定句需要注意的几点:(1) 肯定句中含有some时一般应将some改为any,含有some-所构成的复
3、合不定代词及副词时应将其改为含any的复合不定代词或副词。We are going to buy some apples.We arent going to buy any apples.Last year they went somewhere in China.Last year they didnt go anywhere in China.(2) 肯定句中含有and连接两个并列成分时,一般将and改为or。The clock has feet and legs.The clock doesnt have feet or legs.(或改为:The clock has no feet a
4、nd no legs.)(3) 肯定句中含有always时,应将always改为never以变成完全否定形式;而肯定句中含有almost时,应将almost改为hardly以变成完个否定形式。My mother always goes to work on foot.My mother never goes to work on foot. Dreams of finding lost treasure almost came true.Dreams of finding lost treasure hardly came true.(4) 含有a few, a little等的肯定句改为否定
5、句时可将a few, a little改为few, little表示否定意义。Dad had a little bread for breakfast this morning.Dad had little bread for breakfast this morning. Yesterday I bought a few English books.Yesterday I bought few English books. (5) 含有表示“也”之意的too,also的句子,改为否定句时应将too,also改为either。 Lily likes swimming, too.Lily doe
6、snt like swimming, either. (6) 含有often的肯定句,改为否定句的方法是将often改为seldom。 Jim often rings me up.Jim seldom rings me up. (7) 含有everything, everybody等的肯定句应将它们分别改为nothing, nobody,使其变为否定句。 Everything turns green now.Nothing turns green now. Everybody can help you.Nobody can help you. (8) “let十宾语十动词原形”结构的否定形式可
7、在后面的动词原形前加上否定词not(也可在let前加dont)。Let the children do as they like.Let the children not do as they like. (9) 当肯定句中含有already时,改为否定句应将already变为yet。 We have decided when to start already.We havent decided when to start yet. (10) 肯定句中含有all时,改为否定句应将all改为none而将其变为完全否定形式;肯定句中含有both时,改为否定句应将both改为neither而将其变为
8、完全否定形式;肯定句中含有bothand结构时,应将其改为neithernor而将其变为完全否定形式。此时,应注意谓语动词的人称和数的变化。All of us have learnt surfing from him.None of us have learnt surfing from him.Both of parents know how to search the Internet.Neither of parents knows how to search the Internet.Both the digital camera and the computer are Jacks.
9、Neither the digital camera nor the computer is Jacks. (11) “had better十动词原形”,变否定句时为“better not十动词原形”。Youd better catch the early bus.Youd better not catch the early bus. (12) 使役动词和感官动词(make, let, hear, see, watch等)后接省略to的不定式,此种不定式变为否定句时只需在省略to的动词原形前加not。 I saw her work.I saw her not work. (13) 肯定句中含
10、有still时,变否定句时应改为no longer。 Old Tom is still alive.Old Tom is no longer alive. (14) 肯定句含有“形容词enough”时,变为否定句时应改为“too十该形容词的反义词to”。He runs fast enough to catch up with others.He runs too slow to catch up with others.二、陈述句转换为一般疑问句陈述句转换为一般疑问句时,若句子中有助动词、情态动词或be动词,只需将它们移至句首主语前(词首大写) ,把含有some或some构成的复合不定代词改为
11、any或由any构成的词,并在句末加疑问号“?”。如果陈述句中没有上述词,则需在句首主语前加助动词 Do(Does, Did) ,将谓语动词改用原形,句未加问号“?三、对划线部分提问对划线部分提问时,首先要根据提问对象选好疑问词放在句首,同时,还要注意疑问句的语序。1. 注意疑问句的语序(1) 对句子的主语提问,其语序是:疑问词十谓语十其他成分? She is their teacher.Who is their teacher?(2) 对句子主语的定语提问,其语序是:疑问词十主语十谓语十其他成分? My book is over there.Whose book is over there?
12、(3) 对表语、宾语或状语提问,其语序是:疑问词十一般疑问句?My uncle lives in Beijing.Where does your uncle live?(4) 对表语或宾语的定语提问,其语序是:疑问词十表语或宾语十一般疑问句?Im looking for my watch.Whose watch are you looking for?2. 注意疑问词的选择(1) 问“谁”用who或whom(对主语提问用who,对宾语提问用who,whom均可)。Lucy is a doctor. Who is a doctor?(2) 问“谁的”用whose。 This is his boo
13、k. Whose book is this?(3) 问“地点”用where。 The ball is under the bed. Where is the ball?(4) 问“原因”用why。He didnt go to school because he was ill. Why didnt he go to school?(5) 问“身体状况”用how。My father is fine. How is your father?(6) 问“方式”用 how。Jim often goes to school by bus. How does Jim often go to school?
14、(7) 问“程度”用“how十被修饰语”。The bridge is one thousand meters long. How long is the bridge?(8) 问“多少”用 how much或how many。I have a lot of money. How much money do you have?I have been to Beijing three times. How many times have you been to Beijing?(9) 问“多久”用how long或how soon(how long指动作或状态发生了多久;how soon指动作或状态还有多久将会发生。) He has stayed Shanghai for two weeks. How long has he stayed Shanghai?She will be back in two days. How soon will she be back?(10) 问“动作的发生频率”用ho
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